20134424421 has 20 divisors (see below), whose sum is σ = 30890256012. Its totient is φ = 13060165248.

The previous prime is 20134424383. The next prime is 20134424467. The reversal of 20134424421 is 12442443102.

20134424421 is a `hidden beast` number, since 201 + 34 + 4 + 2 + 4 + 421 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19172556225 + 961868196 = 138465^2 + 31014^2 .

It is not a de Polignac number, because 20134424421 - 2²⁷ = 20000206693 is a prime.

It is a super-2 number, since 2×20134424421² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20134424491) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3356100 + ... + 3362093.

Almost surely, 2^20134424421 is an apocalyptic number.

It is an amenable number.

20134424421 is a deficient number, since it is larger than the sum of its proper divisors (10755831591).

20134424421 is an equidigital number, since it uses as much as digits as its factorization.

20134424421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6718242 (or 6718233 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 20134424421 its reverse (12442443102), we get a palindrome (32576867523).

The spelling of 20134424421 in words is "twenty billion, one hundred thirty-four million, four hundred twenty-four thousand, four hundred twenty-one".